CVE-2026-40830Network attack vector

Database disclosure via unneutralized UpdateParam input

Published May 27, 2026 · Updated May 27, 2026

SQL injection in myREX24 V2, mbCONNECT24, and mymbCONNECT24 through 2.20.0 allows remote authenticated users to read the database. The UpdateParam function in admin.mbnetj.php fails to neutralize special elements before incorporating input into a SQL UPDATE command. High-privilege portal access is required; exploitation exposes the full database and permits changes to values in a noncritical table.

CVSS severity5.5
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SQL injection in myREX24 V2, mbCONNECT24, and mymbCONNECT24 through 2.20.0 allows remote authenticated users to read the database. The UpdateParam function in admin.mbnetj.php fails to neutralize special elements before incorporating input into a SQL UPDATE command. High-privilege portal access is required; exploitation exposes the full database and permits changes to values in a noncritical table.

The record

CVE
CVE-2026-40830
Published
May 27, 2026
Updated
May 27, 2026
Vendor
Helmholz GmbH & Co. KG
Product
myREX24 V2 Virtual Server
Classifications
CWE-89, T1190
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. May 27, 2026CVE publishedPublication date reported by the CVE source.
  2. May 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.0.0 <=2.20.0
  2. Affected versionversion=2.20.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Helmholz GmbH & Co. KG · myREX24 V2 Virtual Serverversion=0.0.0 <=2.20.0; version=2.20.0
Helmholz GmbH & Co. KG · myREX24 V2version=0.0.0 <=2.20.0; version=2.20.0
MB connect line · mbCONNECT24version=0.0.0 <=2.20.0; version=2.20.0
MB connect line · mymbCONNECT24version=0.0.0 <=2.20.0; version=2.20.0

Published CVSS scores

5.5CERT@VDECVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:N
7.0CERT@VDECVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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